Safe Ascend Bosun&#39;s Chair

ABSTRACT

A bracing system for providing seated stability to workers requiring a means of elevation in order to access the exteriors of buildings of several stories height. The present invention suspends a bosun&#39;s chair by means of a sturdy frame erected by means of two “legs” connected together to form an A-frame shape. Each leg is assembled using multiple pole sections fitted together by ferrules. A summit support rod, fitted to where the legs come together at the summit, leans against the building.

CONTINUITY DATA

This is a non-provisional patent application claiming priority to U.S.provisional patent application No. 61/361,423, filed on Jul. 4, 2010.

BACKGROUND OF THE PRESENT INVENTION

The present invention is a movable bosun's chair support apparatus andbracing system that provides seated stability to painters, windowwashers, and other workers who require a means of elevation in order toaccess the exteriors of buildings that have a height of several stories.

Window washing bosun's chair systems that hang suspended from the top ofhigh buildings have been used for many years. Yet these systems cannotbe used for smaller structures of several stories height, because thosestructures are not tall enough for a bracing apparatus to be attached tothe roof. For these smaller structures, before the creation of thepresent invention, the only way to get up high enough was to use aladder.

A ladder is a device designed to provide safe access to a workstation,but its use as a workstation itself is limited and fraught with dangers.The Consumer Product Safety Commission (CPSC) reports that more than90,000 people receive emergency room treatment for ladder accidents eachyear. A ladder can slide, tip, slip, break, or catapult a climber. Also,in one half the ladder accidents investigated by the Bureau of LaborStatistics, the worker carried materials in his hands as he climbed, apractice that contributes to slips. The present invention circumventsthe dangers associated with ladder use at high elevations.

U.S. Pat. No. 4,542,804 is for “Bosun Chair Support Apparatus” issued toPower on Sep. 24, 1985. Power's device is a movable bosun chair supportapparatus that is placed over the top ledge of a building wall andfitted with wheels so that it can slide along the top of the wall.Unlike the present invention, Power's bosun chair is designed to besuspended from a support apparatus that mounts on, and rolls along, thetop of a building. The present invention, however, is designed to be setup in a manner similar to a ladder braced by its two legs, with a bosunchair suspended from a conventional ratcheting pulley mounted at thesummit of the device.

U.S. Pat. No. 5,065,838 is for “Movable Support for Window Washers andthe Like” issued to Finley on Nov. 19, 1991. Finley's device is amovable support structure from which a window washer is suspended.Unlike the present invention, Finley's device is designed to be placedover the top ledge of a building, where it is secured to ensure thesafety of the window washer, but also able to move along the length ofthe building by means of mounted wheels. The present invention, however,is designed to be set up in a manner similar to a ladder braced by itstwo legs, with a bosun chair suspended from a conventional ratchetingpulley mounted at the summit of the device.

U.S. Pat. No. 4,817,758 is for “Window Cleaning Support Structure”issued to Gilmore on Apr. 4, 1989. Gilmore is similar to theabove-described previous patents, in that it is designed to be mountedto a roof and roll along it while a window washer is suspended from thedevice. As with the other two roof mounted devices described above,Gilmore's device is far different from the present invention that setsup similar to a ladder braced by its two legs, with a bosun chairsuspended from a conventional ratcheting pulley mounted at the summit ofthe device.

SUMMARY OF THE PRESENT INVENTION

The present invention suspends a bosun's chair to enable a user to workon the elevated portions of a building. This is accomplished by means ofa sturdy frame erected by means of two “legs” connected together to forman A-frame shape. Each leg is assembled using multiple pole sectionsfitted together by conventional outer bonded ferrules. The pole sectionsare composed of carbon fiber in the preferred embodiment of the presentinvention, although they can also be made of other materials such asfiberglass or aluminum due to the high cost of carbon fiber. Each leghas at its base a pole footing attached to its lowermost pole section bymeans of a pivot and a base support rod. The pivot and base support rodare composed of steel in the preferred embodiment, although they canalso be made of material of equivalent durability. Underneath each polefooting is matting of rubber or equivalent material to increase thepresent invention's stability. A summit support rod is fitted to wherethe legs come together at the summit, and this summit support rod leansagainst the building. The preferred embodiment of the present inventionis envisioned as 40 feet in height.

After leaning the summit of the device against the building, the useradjusts the height of the legs if necessitated by an uneven groundsurface. For added safety, a connecting cable can be attached to thelegs at the bottom of the A-frame. At the top of the A-frame above thebosun's chair is placed a conventional ratcheting pulley. Theconventional ratcheting pulley allows for easy ascending, and a brakesystem allows the operator to easily descend as well.

This present invention eliminates ladder fatigue on the user's legs andfeet, as well as the dangers inherent in using a ladder. With thepresent invention, the user is tied to a system that prevents side toside movement and keeps the user close to the working surface whether itis 20 feet or 30 feet in the air.

FIGURES ASSOCIATED WITH THE PRESENT INVENTION

FIG. 1 shows a front view of the present invention assembled for use inits preferred embodiment.

FIG. 2A shows details of the base of the first leg (10) in the preferredembodiment of the present invention.

FIG. 2B shows details of the base of the second leg (20) in thepreferred embodiment of the present invention.

FIG. 3 shows a front view of the summit of the present invention.

FIG. 4 shows a side view of the summit support structure of the presentinvention.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

Bosun's chairs suspended from the top of very high buildings have beenused for many years. Yet they cannot be used for buildings of severalstories height because those buildings are not tall enough for a bracingapparatus to be attached to the roof. The present invention remediesthis problem, eliminating the need for a user to employ a ladderelevated to unsafe heights when working on the exterior of a building.

FIG. 1 shows a front view of the present invention assembled for use inits preferred embodiment. The present invention utilizes a sturdyA-frame erected by means of a first leg (10) and a second leg (20)connected together by an inner ring (150) at the summit of the presentinvention. Each of the two legs (10 and 20) is assembled using six polesections (70), with each pole section (70) six feet in length. Thesepole sections (70) are joined together by conventional outer bondedferrules (80), each of which connects together two pole sections (70),with each pole section (70) fitting into one end of the ferrule (80). Asummit support rod (30) (not shown in FIG. 1, see FIG. 4) attached tothe inner ring (150) leans against the building. To provide addedstability at the base of the present invention, a cable (40) can beattached connecting the first leg (10) to the second leg (20). The firstleg (10) has at its base a first pole footing (90) attached to itslowermost pole section (70) by means of a first pivot (95) and a firstbase support rod (100) (not shown in FIG. 1, see FIG. 2A). The secondleg (20) has at its base a second pole footing (91) attached to itslowermost pole section (70) by means of a second pivot (95) and a secondbase support rod (105) (not shown in FIG. 1, see FIG. 2B). Underneathboth the first pole footing (90) and second pole footing (91) is arubber matting (115) to increase the present invention's stability.

Also shown in FIG. 1 is the metal-machined-A (170) at the summit of thepresent invention. The metal-machined-A (170) (shown in detail in FIG.3) has at its center an inner ring (150) that connects to the first pole(10) and second pole (20) by means of 10-inch metal tubes (175).Attached to the inner ring (150) is a conventional carabiner hook (160)from which is suspended a conventional ratcheting pulley (55). Theratcheting pulley (55) is a type used for climbing and rope rescues,with a built-in cam that allows for easy ascent and descent. Attached tothe ratcheting pulley (55) is a conventional bosun's chair (50). Thebosun's chair (50) can be any commercially available American NationalStandards Institute-approved suspension harness with an ascender devicethat allows an operator to easily pull down on the line as well asacting as the brake. After the present invention has been set upproperly, the bosun's chair (50) will hang suspended close enough to thebuilding to allow the user to perform work on the building's exterior.Not shown in FIG. 1 is a conventional safety line that can be set up bymeans of a conventional device called a line launcher, also known as amonkey fist. The line launcher has a sponge-like projectile that is shotover the roof of a building using a monkey fist type knot and smallercord, after which the safety line is attached to a firm structure suchas a tree or porch column.

FIG. 2A shows details at the base of the first leg (10) in the preferredembodiment of the present invention. A first base support rod (100),made of steel or material of comparable density, is shown inserted intothe lowermost at least one pole section (70). The first base support rod(100) is approximately four feet long and connected by means of a firstpivot (95) to a first pole fitting (90). The first base support rod(100) inserts into the lowermost pole section (70) of the first leg(10). The first base support rod (100) has numerous “internal” holes(125) spaced along its length, and each pole section (70) also has atleast one “external” hole (130) placed along its length. When thepresent invention is adjusted so that it is stable, and one of theinternal holes (125) and one of the external holes (130) are aligned, aconventional spring-loaded steel pin (110) is inserted through the holes(125 and 130) in order to hold in place the adjusted first leg (10) ofthe present invention. In addition, a rubber matting (115) is fittedinto the bottom of the pole fitting (90) to increase traction.

FIG. 2B shows details at the base of the second leg (20) in thepreferred embodiment of the present invention. A second base support rod(105), made of steel or material of comparable density, is showninserted into the lowermost at least one pole section (70). The secondbase support rod (105) is approximately four feet long and connected bymeans of a second pivot (96) to a second pole fitting (91). The secondbase support rod (105) inserts into the lowermost pole section (70) ofthe second leg (20). The second base support rod (105) has numerous“internal” holes (125) spaced along its length, and each pole section(70) also has at least one “external” hole (130) placed along itslength. When the present invention is adjusted so that it is stable, andone of the internal holes (125) and one of the external holes (130) arealigned, a conventional spring-loaded steel pin (110) is insertedthrough the holes (125 and 130) in order to hold in place the adjustedsecond leg (20) of the present invention. In addition, a rubber matting(115) is fitted into the bottom of the second pole fitting (91) toincrease traction.

FIG. 3 shows a front view of the present invention's summit, where thefirst leg (10) and second leg (20) connect to an inner ring (150) toform a metal-machined-A (170). The metal-machined-A (170) is created byshaving the top of two 10-inch metal tubes (175) at the required angle,and welding them to the legs (10 and 20) and to the inner ring (150),which has within it a star-shaped reinforcement (180) with a center hole(185) through which is placed a summit support rod sleeve (190) (notshown in FIG. 3, see FIG. 4). A carabiner hook (160), shown attached tothe inner ring (150), is the point of attachment for the ratchetingpulley (55) (not shown in FIG. 3, see FIG. 1). (Other embodiments of thepresent invention envision support arms, extending out of the summits ofthe first leg (10) and second leg (20), that will be used to help bracethe present invention against the side of a building.)

FIG. 4 shows a side view of the summit support structure of the presentinvention. The summit support rod sleeve (190) is a cylinder insertedthrough the inner ring (150) via the center hole (185) (not shown inFIG. 4, see FIG. 3). Inserted into the summit support rod sleeve (190)is the summit support rod (30). (The portion of the summit support rod(30) placed within the summit support rod sleeve (190) is shown insilhouette.) The summit support rod (30) is several feet in length, madeof steel or similar durable metal, and has at one end a V-shape (200)that is placed against the exterior of the building. The summit supportrod (30) has numerous “internal” holes (125) spaced along its length,and the summit support rod sleeve (190) has at least one “external” hole(130) placed along its length. When the summit support rod (30) isadjusted to the preferred distance from the building, and one of theinternal holes (125) and one of the external holes (130) are aligned, aconventional spring-loaded steel pin (110) is inserted through the holes(125 and 130) in order to hold in place the adjusted summit support rod(30).

In summary, the present invention is a chair suspension device,comprising an inner ring (150), a first leg (10) in communication withthe inner ring (150), a second leg (20) in communication with the innerring (150), a ratcheting pulley (55) in communication with the innerring (150), and a bosun's chair (50) in communication with theratcheting pulley (55), wherein the first leg (10) has pole sections(70), the first leg (10) has ferrules (80), the second leg (20) has polesections (70), and the second leg (20) has ferrules (80).

The present invention further comprises a first pole footing (90) incommunication with the first leg (10), a second pole footing (91) incommunication with the second leg (20), a first base support rod (100)inside the first leg (10), a second base support rod (105) inside thesecond leg (20), a first pivot (95) disposed at one end of the firstpole footing (90), a second pivot (96) disposed at one end of the secondpole footing (91), a first pivot (95) disposed at one end of the firstbase support rod (100) inside the first leg (10), and a second pivot(96) disposed at one end of the second base support rod (105) inside thesecond leg (20), wherein the first pivot (95) is configured to allow thefirst leg (10) to be adjusted while the first pole footing (90) remainsstationary, and the second pivot (96) is configured to allow the secondleg (20) to be adjusted while the second pole footing (91) remainsstationary, and further comprising a summit support rod (30) disposedthrough the inner ring (150), wherein the summit support rod (30) isdisposed perpendicularly through the plane of the inner ring (150), andfurther comprising a V-shape (200) at one end of the summit support rod(30), and a cable (40) disposed between the first leg (10) and thesecond leg (20).

1. A chair suspension device, comprising: an inner ring; a first leg, in communication with said inner ring; a second leg, in communication with said inner ring; a ratcheting pulley, in communication with said inner ring; and a bosun's chair, in communication with said ratcheting pulley.
 2. The chair suspension device of claim 1, wherein said first leg has pole sections.
 3. The chair suspension device of claim 1, wherein said first leg has ferrules.
 4. The chair suspension device of claim 2, wherein said first leg has ferrules.
 5. The chair suspension device of claim 1, wherein said second leg has pole sections.
 6. The chair suspension device of claim 1, wherein said second leg has ferrules.
 7. The chair suspension device of claim 5, wherein said second leg has ferrules.
 8. The chair suspension device of claim 1, further comprising a first pole footing in communication with said first leg, and a second pole footing in communication with said second leg.
 9. The chair suspension device of claim 1, further comprising a first base support rod inside said first leg, and a second base support rod inside said second leg.
 10. The chair suspension device of claim 8, further comprising a first pivot disposed at one end of said first pole footing, and a second pivot disposed at one end of said second pole footing.
 11. The chair suspension device of claim 9, further comprising a first pivot disposed at one end of said first base support rod inside said first leg, and a second pivot disposed at one end of said second base support rod inside said second leg.
 12. The chair suspension device of claim 11, further comprising a first pole footing in communication with said first leg, and a second pole footing in communication with said second leg.
 13. The chair suspension device of claim 12, wherein said first pivot is configured to allow said first leg to be adjusted while said first pole footing remains stationary.
 14. The chair suspension device of claim 12, wherein said second pivot is configured to allow said second leg to be adjusted while said second pole footing remains stationary.
 15. The chair suspension device of claim 1, further comprising a summit support rod disposed through said inner ring.
 16. The chair suspension device of claim 15, wherein said summit support rod is disposed perpendicularly through the plane of said inner ring.
 17. The chair suspension device of claim 15, further comprising a V-shape at one end of said summit support rod.
 18. The chair suspension device of claim 1, further comprising a cable disposed between said first leg and said second leg.
 19. A chair suspension device, comprising: an inner ring; a first leg, in communication with said inner ring; a second leg, in communication with said inner ring; a ratcheting pulley, in communication with said inner ring; a bosun's chair, in communication with said ratcheting pulley; wherein said first leg has pole sections; wherein said first leg has ferrules; wherein said second leg has pole sections; wherein said second leg has ferrules; further comprising a first pole footing in communication with said first leg, and a second pole footing in communication with said second leg; further comprising a first base support rod inside said first leg, and a second base support rod inside said second leg; further comprising a first pivot disposed at one end of said first pole footing, and a second pivot disposed at one end of said second pole footing; further comprising a first pivot disposed at one end of said first base support rod inside said first leg, and a second pivot disposed at one end of said second base support rod inside said second leg; wherein said first pivot is configured to allow said first leg to be adjusted while said first pole footing remains stationary; wherein said second pivot is configured to allow said second leg to be adjusted while said second pole footing remains stationary; further comprising a summit support rod disposed through said inner ring; wherein said summit support rod is disposed perpendicularly through the plane of said inner ring; further comprising a V-shape at one end of said summit support rod; and further comprising a cable disposed between said first leg and said second leg. 